| 单词 | crissum |
| 释义 | crissum /kris"euhm/, n. , pl. crissa /kris"euh/. Ornith. 1. the region surrounding the cloacal opening beneath the tail of a bird. 2. the feathers of this region collectively. [1870-75; < NL, equiv. to L criss(are) to move the haunches + -um n. suffix] |
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